Unusual af - has anyone experienced the same (sorry if tmi)

Dh and I have been ttc for about 16 months (this time) and I am scheduled for a hsg in a couple of weeks.

Friday I was due my period and as always this makes me feel a bit amorous so dh and I did the deed. Fri evening I noticed that my af had started (red and gloopy like a normal period) but during Fri night only had a tiny smudge. Saturday morning dh and I did the deed again and once more there was quite a bit of red blood on dh but during the day nothing more than a smudge. Sunday morning the scenario was repeated again with more red bleeding, but since then there has been absolutely nothing.

Usually, after the initial red bleed this changes to very dark red/brown then the brown tapers off. Has anyone ever had this happen to them?